Can-type heat exchanger

ABSTRACT

A can-type heat exchanger may include a housing of which one surface is opened and another surface is closed and having a space therein, and a first inlet and a first outlet, which communicate with the space, are provided in a lateral side thereof; a heat radiating unit inserted into the space, provided with connecting lines alternately formed by stacking a plurality of plates, one of the connecting lines communicating with the space, and where the operating fluids are heat-exchanged with each other while passing through the respective connecting lines; and a cover cap mounted at one opened surface of the housing so that the heat radiating unit is integrally mounted on one surface thereof to the space, and a second inlet and a second outlet for communicating with a second connecting line of the connecting lines, are formed at the one surface.

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims priority to and the benefit of Korean Patent Application No. 10-2015-0084260 filed on Jun. 15, 2015, the entire contents of which is incorporated herein for all purposes by this reference.

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a can-type heat exchanger. More particularly, the present invention relates to a can-type heat exchanger which can control temperatures of operating fluids through heat-exchange, improve heat-exchange efficiency, and have reduced weight and size.

Description of Related Art

Generally, a heat exchanger transfers heat from high-temperature fluid to low-temperature fluid through a heat transfer surface, and is used in a heater, a cooler, an evaporator, and a condenser.

Such a heat exchanger re-uses heat energy or controls a temperature of an operating fluid flowing therein for demanded performance. The heat exchanger is applied to an air conditioning system or a transmission oil cooler of a vehicle, and is mounted in an engine compartment.

Since it is difficult to mount the heat exchanger in the engine compartment with restricted space, studies on heat exchangers with smaller size, lighter weight, and higher efficiency have been developed.

A conventional heat exchanger controls the temperatures of the operating fluids according to a condition of a vehicle and supplies the operating fluids to an engine, a transmission, or an air conditioning system. For this purpose, bifurcation circuits and valves are mounted on each hydraulic line through which the operating fluids operated as heating medium or cooling medium passes. Therefore, constituent elements and assembling processes are increased and layout is complicated.

If additional bifurcation circuits and valves are not used, heat exchanging efficiency cannot be controlled according to a flow amount of the operating fluid. Therefore, the temperature of the operating fluid cannot be controlled efficiently.

Further, according to a conventional heat exchanger, size of the heat exchanger should be increased in order to improve heat-exchange efficiency. Further, additional valves for controlling flow of operating fluids should be mounted outside, thus constituent elements are complicated and weight and cost are increased. Accordingly, when the heat exchanger is mounted in the engine compartment, layout is complicated and mounting space of the elements is not sufficient.

The information disclosed in this Background of the Invention section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

BRIEF SUMMARY

Various aspects of the present invention are directed to providing a can-type heat exchanger formed with a can shape that can control temperature of the operating fluids, improve heat-exchange efficiency, reduce weight and size, simplify an engine layout, and easily obtain mounting space, thus improving installability.

Various aspects of the present invention are directed to providing a can-type heat exchanger, including: a housing of which one surface is opened and the other surface is closed and having a space therein, and a first inlet and a first outlet, which communicate with the space, are provided in a lateral side thereof; a heat radiating unit inserted into the space, provided with connecting lines alternately formed by stacking a plurality of plates, one of the connecting lines communicating with the space, and where the operating fluids are heat-exchanged with each other while passing through the respective connecting lines; and a cover cap mounted at one opened surface of the housing so that the heat radiating unit integrally mounted on one surface thereof to the space and a second inlet and a second outlet for communicating with the other connecting line of the connecting lines, are formed at the one surface.

A coupling portion may be integrally formed with an exterior circumference of the cover cap to be bent toward the housing.

The coupling portion may be coupled to the housing by clinching an exterior circumference thereof on a state that an interior circumference thereof is surrounded by an exterior circumference of the housing.

A seal ring is disposed between the housing and the cover cap.

The first inlet and the first outlet may be formed at separate locations at a lateral side of the housing.

The second inlet and the second outlet may be formed at separate locations at one surface of the cover cap.

The first inlet and the first outlet may be respectively formed at a position intersecting the second inlet and the second outlet.

The housing may be formed with a cylinder shape through injection molding.

The housing may be made of a plastic material.

The plate may be formed with a disk shape, and first and second connecting holes may be formed to the plate corresponding to the second inlet and the second outlet.

The heat radiating unit may further include: a first fixing plate being mounted to one surface of the heat radiating unit which is fixed to the cover cap and forming first and second penetration holes to correspond with the first and second connecting holes; and a second fixing plate being mounted with the other surface of the heat radiating unit which is inserted into the space.

The plate may include: a plurality of protrusions protruded from the plate to be disposed apart from each other by a set interval; and a distributing protrusion formed from the center of the plate to an exterior circumference of the plate to be disposed between the first inlet and the first outlet.

The protrusion may be formed with a hemisphere shape, and may protrude from the plate in the same direction as the distributing protrusion.

One of operating fluids may be a coolant flowing from a radiator, and another one of operating fluids may be transmission oil flowing from an automatic transmission.

The coolant may flow to the heat radiating unit through the first inlet and the first outlet, the transmission oil may flow to the heat radiating unit through the second inlet and the second outlet, and the connecting line may include a first connecting line in which the coolant flows and a second connecting line in which the transmission oil flows.

At least one mounting portion may be integrally formed with the other surface circumference of the housing.

The cover cap may be made of a metal material, and the heat radiating unit is integrally mounted to the cover cap by brazing.

A mounting plate may be mounted to the other surface of the cover cap, and a mounting portion may be integrally formed with an exterior circumference of the mounting plate.

According to the present invention, the can-type heat exchanger can control the temperature of the operating fluids and is formed with a can shape that can improve efficiency of heat exchange and reduce weight and size, and it is thereby possible to simplify an engine layout.

Further, it may be easy to obtain a mounting space and thereby installability may be improved.

In addition, manufacturing and assembly working may be simple, manufacturing cost may be reduced, and productivity may be improved as the cover cap to which the heat radiating unit is integrally mounted is coupled with the housing which is manufactured by injection molding.

Furthermore, a defective completed product may not be produced such that productivity is improved by checking whether a defective heat radiating unit is produced before the cover cap is assembled therewith.

The methods and apparatuses of the present invention have other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings, which are incorporated herein, and the following Detailed Description, which together serve to explain certain principles of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a cooling system of an automatic transmission to which a can-type heat exchanger according to an exemplary embodiment of the present invention is applied.

FIG. 2 is a perspective view of a can-type heat exchanger according to an exemplary embodiment of the present invention.

FIG. 3 is an exploded perspective view of a can-type heat exchanger according to an exemplary embodiment of the present invention.

FIG. 4 is a cross-sectional view taken along the line A-A of FIG. 2.

FIG. 5 is a cross-sectional view taken along the line B-B of FIG. 2.

FIG. 6 is an exploded perspective view of a heat radiating unit applied to a can-type heat exchanger according to an exemplary embodiment of the present invention.

FIG. 7 is a perspective view of a plate of a heat dissipation unit applied to a can-type heat exchanger according to an exemplary embodiment of the present invention.

FIG. 8 is a drawing for describing operation of a can-type heat exchanger according to an exemplary embodiment of the present invention.

FIG. 9 is a perspective view of a can-type heat exchanger according to another exemplary embodiment of the present invention.

It should be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various features illustrative of the basic principles of the invention. The specific design features of the present invention as disclosed herein, including, for example, specific dimensions, orientations, locations, and shapes will be determined in part by the particular intended application and use environment.

In the figures, reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing.

DETAILED DESCRIPTION

Reference will now be made in detail to various embodiments of the present invention(s), examples of which are illustrated in the accompanying drawings and described below. While the invention(s) will be described in conjunction with exemplary embodiments, it will be understood that the present description is not intended to limit the invention(s) to those exemplary embodiments. On the contrary, the invention(s) is/are intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.

An exemplary embodiment of the present invention will hereinafter be described in detail with reference to the accompanying drawings.

First, since the exemplary embodiment described in the specification and the configurations shown in the drawings are merely the most preferable exemplary embodiment and configurations of the present invention, they do not represent all of the technical ideas of the present invention, and it should be understood that that various equivalents and modified examples, which may replace the exemplary embodiments, are possible when filing the present application.

In order to clearly describe the present invention, parts that are irrelevant to the description are omitted, and identical or similar constituent elements throughout the specification are denoted by the same reference numerals.

Since the size and thickness of each configuration shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to configurations illustrated in the drawings, and in order to clearly illustrate several parts and areas, enlarged thicknesses are shown.

Moreover, throughout the specification, unless explicitly described to the contrary, the word “comprise” and variations such as “comprises” or “comprising” will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

Furthermore, terms such as “ . . . unit”, “ . . . means”, “ . . . part”, and “ . . . member” described in the specification mean a unit of a comprehensive configuration having at least one function or operation.

FIG. 1 is a schematic diagram of a cooling system of an automatic transmission to which a can-type heat exchanger according to an exemplary embodiment of the present invention is applied.

Referring to FIG. 1, a can-type heat exchanger 100 according to an exemplary embodiment of the present invention applies to a cooling system of an automatic transmission.

As shown in FIG. 1, the cooling system of the automatic transmission is provided with a cooling line for cooling an engine. A coolant passes through a radiator 20 having a cooling fan 41 through a water pump 10 and is cooled by the radiator 20. A heater core 30 connected to a heating system of the vehicle is mounted at the cooling line.

Here, the can-type heat exchanger 100 according to an exemplary embodiment of the present invention can control temperatures of operating fluids which flow inside of the can-type heat exchanger 100, through heat-exchange.

The can-type heat exchanger 100 according to an exemplary embodiment of the present invention is disposed between the water pump 10 and the heater core 30, and is connected to an automatic transmission 40 through an oil line (hereinafter “O.L”)

In the exemplary embodiment of the present, the operating fluids include a coolant flowing from the radiator 20 and transmission oil flowing from the automatic transmission 40. The can-type heat exchanger 100 causes the transmission oil to exchange heat with the coolant such that a temperatures of the transmission oil is controlled.

FIG. 2 and FIG. 3 are a perspective view and an exploded perspective view of the can-type heat exchanger according to an exemplary embodiment of the present invention, respectively.

As shown in FIG. 2 and FIG. 3, the can-type heat exchanger 100 may include a housing 101, a heat radiating unit 110, and a cover cap 130.

The housing 101 of which one surface is opened and the other surface is closed has a space S therein. A first inlet 103 and a first outlet 105, which communicate with to the space S, are provided in a lateral side of the housing 101.

Here, the housing 101 may be formed with a cylinder shape through injection molding.

Meanwhile, the housing 101 may be formed with a polygon shape including a cylinder shape.

The housing 101 is made of a plastic material.

Further, at least one mounting portion 107 may be formed with the other surface circumference of the housing 101.

The mounting portion 107 is for mounting the can-type heat exchanger 100 inside an engine compartment, and in the present exemplary embodiment, three mounting portions 107 are formed at positions spaced apart from each other around an exterior circumference of the housing 101 at a set angle.

In the present exemplary embodiment, the three mounting portions 107 are formed at positions spaced apart from each other around an exterior circumference of the housing 101 at a set angle are described as an exemplary embodiment, but the present invention is not limited thereto, and the size, the number, and the positions of the mounting portion 107 can be modified and applied.

Meanwhile, the first inlet 103 and the first outlet 105 may be formed at separate locations at a lateral side exterior circumference of the housing 101.

FIG. 4 is a cross-sectional view taken along the line A-A of FIG. 2, FIG. 5 is a cross-sectional view taken along the line B-B of FIG. 2, FIG. 6 is an exploded perspective view of a heat radiating unit applied to a can-type heat exchanger according to an exemplary embodiment of the present invention, and FIG. 7 is a perspective view of a plate of a heat dissipation unit applied to a can-type heat exchanger according to an exemplary embodiment of the present invention.

As shown in FIG. 3 to FIG. 6, in the present exemplary embodiment, the heat radiating unit 110 is inserted into the space S and is provided with connecting lines 113 alternately formed by stacking a plurality of plates 111.

One connecting 113 line of the connecting lines 113 communicates with the space S, and the operating fluids are heat-exchanged with each other while passing through the respective connecting lines 113.

The cover cap 130 is mounted at one opened surface of the housing 101 so that the heat radiating unit 110 is integrally mounted on one surface thereof to the space S.

A second inlet 131 and a second outlet 133 for communicating with the other connecting line 113 of the connecting lines 113 are formed at the one surface of the cover cap 130.

Here, the cover cap 130 is made of a metal material, and the heat radiating unit 110 is integrally mounted to the cover cap 130 by brazing.

That is, the heat radiating unit 110 is assembled with the cover cap 130 before the cover cap 130 is mounted to the housing 101.

Accordingly, the heat radiating unit 110 may be prevented from having operating defects by pre-inspecting leakage of operating fluids inflowed from the connecting line 113, which communicates with the second inlet 131 and the second outlet 133.

Meanwhile, the second inlet 131 and the second outlet 133 may be formed at one surface of the cover cap 130 to be spaced apart.

That is, the second inlet 131 and the second outlet 133 are respectively formed at a position intersecting the first inlet 103 and the first outlet 105.

Accordingly, the coolant may flow into the space S and the heat radiating unit 110 through the first inlet 103 and the first outlet 105. The transmission oil flows into the heat radiating unit 110 through the second inlet 131 and the second outlet 133.

Here, the cover cap 130 includes a coupling portion 135. One end of the coupling portion 135 is integrally formed with an exterior circumference of the cover cap 130, and the other of the coupling portion 135 is bent toward the housing 101.

The coupling portion 135 is coupled to the housing 101 by clinching an exterior circumference thereof on a state that an interior circumference thereof is surrounded by an exterior circumference of the housing 101.

That is, the cover cap 130 is strongly connected to the housing 101 by repeatedly clinching an exterior circumference of the coupling portion 135.

In the present exemplary embodiment, a seal ring 140 may be disposed between the housing 101 and the cover cap 130.

The seal ring 140 seals between the space S and the cover cap 130 to prevent the coolant flowing into the space S from leaking to the outside of the housing 101.

Meanwhile, one connecting line 113 of the connecting lines 113 communicates with the space S, and the coolant and the transmission oil supplied from the first and second inlets 103 and 131 are heat-exchanged with each other in the heat radiating unit 110 while passing through the respective connecting lines 113.

That is, when the transmission oil flows from the second inlet 131 and circulates in the heat radiating unit 110, the transmission oil and the coolant flowing into the space S of the housing 101 through the first inlet 103 flow in opposite directions to each other by counterflow of the transmission oil and the coolant.

Here, the connecting line 113 may include a first connecting line 113 a through which the coolant flows into the space S, and a second connecting line 113 b in which the transmission oil flows.

In the present exemplary embodiment, the plate 111 may be formed with a disk shape corresponding to the housing 101, and first and second connecting holes 115 and 117 are formed to the plate 111 corresponding to the second inlet 131 and the second outlet 133.

The transmission oil flowing from the second inlet 131 flows into the heat radiating unit 110 through the first connecting hole 115, passes through the second connecting line 113 b, and exhausts to the second outlet 133 through the second connecting hole 117.

Meanwhile, as shown in FIG. 7, the plate 111 may include a plurality of protrusions 118 and a distributing protrusion 119. The plurality of protrusions 118 are protruded from the plate 111 to be disposed apart from each other by a set interval. The distributing protrusion 119 is formed from the center of the plate 111 to an exterior circumference of the plate 111 to be disposed between the first inlet 103 and the first outlet 105.

Each of the protrusions 118 may be formed with a hemispherical shape, may protrude from the plate 111 in the same direction as the distributing protrusion 119, and may be formed in plural from the center of the plate 111 to the exterior circumference in a circumference direction.

When the plates 111 are stacked, the protruded parts of the protrusion 118 and the distributing protrusion 119 are connected with each other.

Since two assembled plates 111 of which each protrusion 118 contacts each distributing protrusion 119 are stacked in plural, the first connecting line 113 a and the second connecting line 113 b are alternately formed.

Here, the protrusion 118 generates flow resistance to the coolant passing through the first connecting line 113 a of the heat radiating unit 110 and the transmission oil passing through the second connecting line 113 b, such that heat exchange efficiency is improved.

Further, the distributing protrusion 119 evenly distributes flow of each operating fluid in order to increase a flow distance of the transmission oil and the coolant flow passing through the first and second connecting lines 113 a and 113 b, such that each operating fluid evenly flows by the entire region of the plate 111 of the heat radiating unit 110.

The heat radiating unit 110 includes first and second fixing plates 121 and 127.

The first fixing plate 121 is mounted to one surface of the heat radiating unit 110 which is fixed to the cover cap 130 and has first and second penetration holes 123 and 125 which are formed to correspond with the first and second connecting holes 115 and 117.

The second fixing plate 127 is mounted with the other surface of the heat radiating unit 110 which is inserted into the space.

Here, the second fixing plate 127 prevents a leakage of the transmission oil inflowed through the first and second connecting holes 115 and 117 by closing the first and second connecting holes 115 and 117 formed at the plate 111 on the other surface of the heat radiating unit 110.

Meanwhile, in the present exemplary embodiment, the coolant flows in and is exhausted through the first inlet 103 and the first outlet 105, respectively, and flows in the first connecting line 113 a at an inside of the space S. The transmission oil flows in the second connecting line 113 b through the second inlet 131. However, flow of the coolant and the transmission oil may be changed.

Hereinafter, functions and operations of the can-type heat exchanger 100 according to an exemplary embodiment of the present invention will be described.

FIG. 8 is a drawing for describing operation of a can-type heat exchanger according to an exemplary embodiment of the present invention.

As shown in FIG. 8, the coolant flowing through the first inlet 103 flows in the space S, passes through the outside of the heat radiating unit 110 and the first connecting line 113 a, and is exhausted through the first outlet 105.

The coolant passes through the first connecting lines 113 a from the space S, and the transmission oil flows by the second inlet 131, passing through the second connecting lines 113 b. Accordingly, the transmission oil is heat-exchanged with the coolant at the space S of the housing 101, and the temperature of the transmission oil is adjusted.

Here, the transmission oil flows from the automatic transmission 40 through the second inlet 131. The flowed transmission oil passes through the second connecting line 113 b of the heat radiating unit 110 in the space S and then is exhausted through the second outlet 133, such that the transmission oil is heat-exchanged with the coolant.

In this case, the transmission oil and the coolant having flowed into the first and second inlets 103 and 131 are heat-exchanged with each other by counterflow as the first and second inlets 103 and 131 are respectively formed at positions intersecting each other at a lateral side of the housing 101 and one surface of the cover cap 130 such that they may be more efficiently heat-exchanged with each other.

Therefore, the transmission oil, the temperature of which is raised by operation of the automatic transmission 40, is cooled through heat exchange with the coolant in the heat radiating unit 110 of the can-type heat exchanger 100 and is then supplied to the automatic transmission 40.

That is, since the can-type heat exchanger 100 supplies the cooled transmission oil to the automatic transmission 40 rotating at a high speed, occurrence of slip in the automatic transmission 40 is prevented.

In an exemplary embodiment of the present invention, the can-type heat exchanger 100 controls the temperature of the transmission oil such that the coolant and the transmission oil having flowed into the first and second inlets 103 and 131 are heat-exchanged with each other.

Meanwhile, components of a can-type heat exchanger 200 according to another exemplary embodiment of the present invention, configured as above, will be described below referring to the accompanying FIG. 9.

FIG. 9 is a perspective view of a can-type heat exchanger according to another exemplary embodiment of the present invention.

Referring to FIG. 9, the can-type heat exchanger 200 according to another exemplary embodiment of the present invention includes a housing 201, a heat radiating unit 210, and a cover cap 230.

Here, the housing 201 includes a first inlet 203 and a first outlet 205. The cover cap 230 includes a second inlet 231 and a second outlet 233.

The cover cap 230 includes a coupling portion 235, as described above, and is the same as that of the first exemplary embodiment of the present invention and therefore a detailed description thereof will be omitted.

In another exemplary embodiment of the present invention, a mounting plate 250 may be mounted to the other surface of the cover cap 230, and a mounting portion 251 may be integrally formed with an exterior circumference of the mounting plate 250.

Accordingly, in another exemplary embodiment of the present invention, the can-type heat exchanger 200 may be directly mounted to one side of the automatic transmission 40 through the mounting plate 250.

That is, in another exemplary embodiment of the present invention, the can-type heat exchanger 200 is mounted to one side of the automatic transmission 40 through the mounting portion 251 of the mounting plate 250 mounted to the cover cap 230, thereby eliminating connecting pipes for supplying or exhausting the transmission oil.

According to an exemplary embodiment of the present invention, the can-type heat exchanger 100 and 200 can control the temperature of the operating fluids and is formed with a can shape that can improve efficiency of heat exchange and reduce weight and size, so it is possible to simplify an engine layout.

Further, it may be easy to obtain a mounting space and thereby installability may be improved.

Further, manufacturing and assembly work may be simple, manufacturing cost may be reduced, and productivity may be improved as the cover cap 130 (and 230) to which the heat radiating unit 110 (and 210) is integrally mounted is coupled with the housing 101 (and 201) which is manufactured by injection molding.

Furthermore, the defective complete product may not be produced such that productivity is improved by checking whether a defective heat radiating unit 110 (and 210) is produced before the cover cap 130 (and 230) is assembled therewith.

For convenience in explanation and accurate definition in the appended claims, the terms “upper”, “lower”, “inner” and “outer” are used to describe features of the exemplary embodiments with reference to the positions of such features as displayed in the figures.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and their practical application, to thereby enable others skilled in the art to make and utilize various exemplary embodiments of the present invention, as well as various alternatives and modifications thereof. It is intended that the scope of the invention be defined by the Claims appended hereto and their equivalents. 

What is claimed is:
 1. A can-type heat exchanger comprising: a housing of which a first surface is opened and a second surface is closed and having a space therein, and a first inlet and a first outlet, which communicate with the space, are provided in a lateral side thereof; a heat radiating unit inserted into the space, provided with connecting lines alternately formed by stacking a plurality of plates, one of the connecting lines communicating with the space, and where the operating fluids are heat-exchanged with each other while passing through the respective connecting lines; and a cover cap mounted at a first opened surface of the housing so that the heat radiating unit integrally mounted on one surface thereof to the space, and a second inlet and a second outlet for communicating with a second connecting line of the connecting lines, are formed at the one surface.
 2. The can-type heat exchanger of claim 1, wherein a coupling portion is integrally formed with an exterior circumference of the cover cap to be bent toward the housing.
 3. The can-type heat exchanger of claim 2, wherein the coupling portion is clinching-coupled to the housing on a state that an interior circumference thereof is surrounded by an exterior circumference of the housing.
 4. The can-type heat exchanger of claim 1, wherein a seal ring is disposed between the housing and the cover cap.
 5. The can-type heat exchanger of claim 1, wherein the first inlet and the first outlet are formed at separate locations at a lateral side of the housing.
 6. The can-type heat exchanger of claim 1, wherein the second inlet and the second outlet are formed at one surface of the cover cap to be spaced apart.
 7. The can-type heat exchanger of claim 1, wherein the first inlet and the first outlet are respectively formed at a position intersecting the second inlet and the second outlet.
 8. The can-type heat exchanger of claim 1, wherein the housing is formed with a cylinder shape through injection molding.
 9. The can-type heat exchanger of claim 1, wherein the housing is made of a plastic material.
 10. The can-type heat exchanger of claim 1, wherein the plate is formed with a disk shape, and first and second connecting holes are formed to the plate corresponding to the second inlet and the second outlet.
 11. The can-type heat exchanger of claim 10, wherein the heat radiating unit further comprises: a first fixing plate being mounted to a first surface of the heat radiating unit which is fixed to the cover cap and forming first and second penetration holes to correspond with the first and second connecting holes; and a second fixing plate being mounted with a second surface of the heat radiating unit which is inserted into the space.
 12. The can-type heat exchanger of claim 1, wherein the plate comprises: a plurality of protrusions protruded from the plate to be disposed apart to each other by a set interval; and a distributing protrusion formed from the center of the plate to an exterior circumference of the plate to be disposed between the first inlet and the first outlet.
 13. The can-type heat exchanger of claim 12, wherein the protrusions are formed with a hemisphere shape, and protrude from the plate in a same direction as the distributing protrusion.
 14. The can-type heat exchanger of claim 1, wherein one of operating fluids is a coolant flowing from a radiator, and another one of operating fluids is transmission oil flowing from an automatic transmission.
 15. The can-type heat exchanger of claim 14, wherein the coolant flows to the heat radiating unit through the first inlet and the first outlet, the transmission oil flows to the heat radiating unit through the second inlet and the second outlet, and the connecting line comprises a first connecting line in which the coolant flows and a second connecting line in which the transmission oil flows.
 16. The can-type heat exchanger of claim 1, wherein at least one mounting portion is integrally formed with a second surface circumference of the housing.
 17. The can-type heat exchanger of claim 1, wherein the cover cap is made of a metal material, and the heat radiating unit is integrally mounted to the cover cap by brazing.
 18. The can-type heat exchanger of claim 1, wherein a mounting plate is mounted to a second surface of the cover cap and a mounting portion is integrally formed with an exterior circumference of the mounting plate. 